{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb7f75643751d285e426d4b8077b4ff9db19a45e9001db866485dd34755c5b3e4",
    "signature": "0x0b96f7912d21ef5c6d6e01537b1a28138f60ae77f8d0e2651074b6c554b01bd17097917c3b119146c663766ed153a23421550966bdb2a5f2c8d9c63f20341ca91b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}