{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348562674",
    "entityType": "Track",
    "nonce": "0x163b2a78f4b2cc263f2d6926aa03ed15289b8ba71770f7a256607993da86e38a",
    "signature": "0x14fa623fbc70140811a79aac25b2d142f87393f15f0d01589a0b7926b8271bfc6deb988c905bfa0efda8a0f1c548bd644d09283be9b11763cc8835bedb8065481c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}