{
  "manageEntity": {
    "action": "Save",
    "entityId": "1028514",
    "entityType": "Track",
    "nonce": "0x5aac0a85b7e2116d8b099324abf3ee6b6c00ab99e80c69d4d1cedaa4d3b36c46",
    "signature": "0xb712d5f6e6b6990ba46522ef9a823c727d34ddbaade03d74b3457874d8a3853f168f64f035e16e49895309ce15ac6d828c6a9801d6e1e013bf9f8d4b9fdbdb841b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}