{
  "manageEntity": {
    "action": "Save",
    "entityId": "1386003773",
    "entityType": "Track",
    "nonce": "0x0a2ae67ccd051dce3d4fb03abb153032f8fb96e58bba24cbc5e183a11bd94b05",
    "signature": "0xefb61c96aaaa65ea88d4a513540d8b22bb4b905ac754cdeab699b938408030710565eb8cd5a771fd6aa3e76a2d5306793b24ef6b3c8c882172ba493cb11e140a1c",
    "signer": "0x45C74e4f36E4e5064C5321eeED3748fD52B04eA8",
    "userId": "133970929"
  }
}