{
  "manageEntity": {
    "action": "Save",
    "entityId": "467737291",
    "entityType": "Track",
    "nonce": "0x9581d384350eb56373f5bade0805cc0d4d226291720f42c94c4a48655cfe8a06",
    "signature": "0xeaa385c79115b4c0f84733881ebc36cf7cef1859b1b1e1929c5a28b546e560b24ea461928381ddb5c8f2b5ea08eab0b01cc054ffdca865114ff1f1e3539620c21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}