{
  "manageEntity": {
    "action": "Save",
    "entityId": "109507",
    "entityType": "Track",
    "nonce": "0x213f114a08d1a0809896340879d4c0a5d7a8de54193d1a3591564be36a201592",
    "signature": "0x95227995c07d7cae11c1f750c169694de8a5b45895f2ec5b2bfeccc37fc5b2fd2ecbe22d63eaec581392fdadfe8e5b779b93418e3279d85c6b424188f31210d81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}