{
  "manageEntity": {
    "action": "Save",
    "entityId": "759393379",
    "entityType": "Track",
    "nonce": "0x52ac731c2cf03c906022c883e29af41d0909cca26b7ee261164dbf96d8a6ff4f",
    "signature": "0xfee3a0400c4ff4789f06b1e438a3777245afc297245638a5ed1b2edfe6d1dcd0760c6836edac4dd2f7a98e7486a0090ae341d9d8e5e9eba18a634eb9a927f5431b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}