{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345427244",
    "entityType": "Track",
    "nonce": "0x8569837325f2ec1f2c636108e9f2e53e383a2ed910c0d2854738d113862c2e46",
    "signature": "0x8e20e2fadf31d3b6e767db3733d98548fa2c5c222dc48a79f14a86eaf8afdb206eac7fdef4ebfbb82e452e447a69e03cab0ec3d9e0513915e4ae5c4788c9434a1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}