{
  "manageEntity": {
    "action": "Save",
    "entityId": "430983",
    "entityType": "Track",
    "nonce": "0x5d95d3a0f57ae601081ae16e434914254cdd8f108e0dce80edb787cc8d10af7e",
    "signature": "0xac0f0bbc2774d6e8e4cedf4a1e9bb4f9beeeb1af0430746e32cf787d0b6069ab573ad87131a5125aae66b70a9a8184254e2502358f8dba40b066f0e40b314f8e1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}