{
  "manageEntity": {
    "action": "Save",
    "entityId": "2002616673",
    "entityType": "Track",
    "nonce": "0x931a8af01907b923324a27475b05d24e7325fa4d313faf45aa326836f6bae520",
    "signature": "0x3a2a5f6a76d001b54626bffa8a2856278dd40158ba467abe6f2ae512fc0bc09c481d5f3d7038613d7b37cc0a2359e22e954098428f55738812e9e56d10e000651b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}