{
  "manageEntity": {
    "action": "Save",
    "entityId": "1759095883",
    "entityType": "Track",
    "nonce": "0x40fda35a228f265327c0e846662eb23261eac428e9fa5868e00f9d6f704caf25",
    "signature": "0xfc19379444e7fd5b4794c099d3f5392f89fdcb275bb84496a13b8096727301827c3d6408fddd9764d9f68c0aea16a21fdf39c078b556edae336e3bfeb7737ce71b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}