{
  "manageEntity": {
    "action": "Save",
    "entityId": "907185",
    "entityType": "Track",
    "nonce": "0x73ef5efaf947f8f87907c1b1b6800020adcadd5278603575d82fcdd24e240af4",
    "signature": "0x0ae5f588ad01aeae53108c146d6eec7e095f60092aba073ab7cdc2822dc825154cfc998b61a231c822a92c60c05393c303535de695e7c9fe0ce514c5e15880351b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}