{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985703125",
    "entityType": "Track",
    "nonce": "0xef301a40238da6a922dfa28e62fe73a3bb05a6c028c0d99e988e22cd823ab097",
    "signature": "0x2aa98d4076aae9dbcf2fd27b3f2cded644205046ff94ae039948be06e7c6d35a005d3482c9ba82eb8b5abdb4fc4a9857de50c408d31e0ec9c9129742ca8694971b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}