{
  "manageEntity": {
    "action": "Save",
    "entityId": "965551781",
    "entityType": "Track",
    "nonce": "0xc409d52e5e98bf66af49badd5891300c12d42798bd81e2f299f29e76ae5e4c7b",
    "signature": "0xcd0f8d2512a7adf6196263ac08c0fad790d46571d22ee0a8deaa27ec20deaae63eea14b723ef5638dd11b0375dbf5894676947d29ae5f8c35ac5fc654975a9551c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}