{
  "manageEntity": {
    "action": "Save",
    "entityId": "143312508",
    "entityType": "Track",
    "nonce": "0x808b6bae88bad374a32abe758599e905196585f359e641e423b8f7fbd17cc92c",
    "signature": "0x79bca43caf37004c48e0392eba85400692dfa9b70696f6a55d8fb4ba49529d362877fd421d70d0297fe19fa1f86fe0a5cbe0a9c0b4e9aba678ed8274b7671e6c1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}