{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662563123",
    "entityType": "Track",
    "nonce": "0x1203bcc71a39a1400eb22329a178a076de6edbc7acad7a2f3453416b5696e489",
    "signature": "0x4babb40f89d72dfd5ff6199e03eaa8260ac9317b4ce772a2921161289fa6f2362f17478a8c3dd53fec535c04a021a6f3e50ea0e134d9e1935f179b1d12a37e271c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}