{
  "manageEntity": {
    "action": "Save",
    "entityId": "301981",
    "entityType": "Track",
    "nonce": "0x0524ee819e0beb51278dc97a0a2ef7d0edf0373364fd1e98be7484c69ca1ac7c",
    "signature": "0x476f6ac8e93686c01c46961ca83a92c0fdae9a17cb63e2f36f12999e7414560b52512fcecf8c038fd60d49f8e562aae916c57da46fbd115edc996fe00d5e4e5a1c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}