{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015984",
    "entityType": "Track",
    "nonce": "0x5af205bc301db25dc607d727f5ab5eba2302d7642a775d50a9324a86da8b21bd",
    "signature": "0x39adbcb9bc5aa27a22a91e224c1cc9dd19a94e20e40707dbf3455de9a5c2abb044f933c7cb5170fae36c493e48c9f7abe3cfafdc88ae95681751f121e75f05041c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}