{
  "manageEntity": {
    "action": "Save",
    "entityId": "19489379",
    "entityType": "Track",
    "nonce": "0x45282dbbd1326b50233fbebab1feef17e46f78571a7de2c5b67a302d738dafff",
    "signature": "0xfa8c41cc94f6d20572c14934b0c884ccd1012435116982d0702d36ff303e4cdb0b3225fcbd79e3995bccd21c04708587d8aa200f217831734da7360e8a0436a91b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}