{
  "manageEntity": {
    "action": "Save",
    "entityId": "960139",
    "entityType": "Track",
    "nonce": "0x6a84be5cfb4c0e3638a719d8e27967c8e151ba7b049417c347a084fb3a3beb93",
    "signature": "0xfb34b809d2f8bb6de0a9b51df49f511f69e598ab084abe9dc0aafc77acc849186c05d1a7659d4be7e026acc458e3bf5167ce6ec494f08476af2142fcbd2caf911b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}