{
  "manageEntity": {
    "action": "Save",
    "entityId": "585874064",
    "entityType": "Track",
    "nonce": "0x9c44f06ebe3afcc076c777c82fc049048e6cfd10a61fe4f59c49fbfa62df2bbd",
    "signature": "0x777fccfa26d9a2fecefa444e3295909420e94e83f94076dc2195e213f9ad0edb7954a1b06d6875f555711fa12ef01fdad559722bb05b474f928e736426b6c3721b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}