{
  "manageEntity": {
    "action": "Save",
    "entityId": "2122426331",
    "entityType": "Track",
    "nonce": "1790110971730094884",
    "signature": "0x82c35d251246cc56d8b064ace3705cf9fcbb1b53fe8902106e33fbb6574e65f654cf115eb3296c265ac45c6b1d36401f239eca6edd5f33896df8e686e47c74ea1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}