{
  "manageEntity": {
    "action": "Update",
    "entityId": "738927631",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7e89df167f894ef6a44898cb9b4d3d4e794808ef49c4990e501a9380b397e718",
    "signature": "0xfe9057c03521f63b4a18a63ba777b566c62da6dedd81e554970d1fd06c9ecf5d71aecae70d0e0f26f293709e4be6265ccc63e0b8924730d270d77fb6e68359b31b",
    "signer": "0x3639caC03eDAc05E4869C472a6A05AfBd46e7838",
    "userId": "738927631"
  }
}