{
  "manageEntity": {
    "action": "Save",
    "entityId": "1365397489",
    "entityType": "Track",
    "nonce": "0x8fb47c1b40b7164699199f57689d99f941aafb830041d9e83ab888cc5dd641fd",
    "signature": "0x09580d07cce108e3027747820a830e227e212c00acf6b67862abd02be5718d0d5391a1bb8bf1697613b122e95a9bfd1aeac577836622b25921b4b2d7d09763f01b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}