{
  "manageEntity": {
    "action": "Save",
    "entityId": "1949082296",
    "entityType": "Track",
    "nonce": "0x0d0e7ec20f5b18252a87a1fc27cc37b21c9b5d66f7d8427da3b6751efefd5c69",
    "signature": "0xc88d44d52f2fc7d0c46b8c1bd03a1ac501ab2ae7b7ad23495c098ef5f133a81b14f9c36b332a8df879ab6f361702317508b24997e203ddd8f9e4432404554db01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}