{
  "manageEntity": {
    "action": "Save",
    "entityId": "1329809845",
    "entityType": "Track",
    "nonce": "0xdaa6b2af94853a335eb2dd86f3e46e27820b4c275207001726c4858b98ba8b7d",
    "signature": "0x16915424abf70db21add9dd1d31c6aca9c543fb06ed5089b495a7b83e0bccfe94033a81d52099782af93be65a34572d17314ffe2f5b0283d06e573ad66b3bff31b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}