{
  "manageEntity": {
    "action": "Update",
    "entityId": "831708899",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4b7870f94c35d77603f427cc30f61613bf915de4e7dbc7e4a41609cb08ebd5e3",
    "signature": "0x3ab35223e24ef9ca4329645c6b31a334b47ca1af68c78be037d907d326e773177aff329ef1069705dbfd993d479d43eebe6a48d1bf4e17ebea50ff70588dac061b",
    "signer": "0xe7C52e9b13a79d2ec04B0A3E3053850A2A7B68C4",
    "userId": "831708899"
  }
}