{
  "manageEntity": {
    "action": "Update",
    "entityId": "451290729",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x98d3b7184e3ce17b63fb1fff560fac23048174c3f251d2e6e673818593241a1f",
    "signature": "0x5d8a25c0c4c3cd2dbd63f2d190c5e2376aff6b463b6dc314fbed1de41cf3545c309fbbb3ba97096c8e5f0c743271575d2970e9bac569ba17baf4dd080ce326881b",
    "signer": "0xCdF50ba0F0AbbF8E595af9e865f86981ff3e5Bb5",
    "userId": "451290729"
  }
}