{
  "manageEntity": {
    "action": "Save",
    "entityId": "1144274306",
    "entityType": "Track",
    "nonce": "0x250568d99efc31cf7df44c326d1d1f1171b889ead4bb66d7e40487c7a6862860",
    "signature": "0xb149f8b74eab690c609d5e7471f750e2bcd3d73e74913e8f2c00103f9ed16273452963f238927071c894d0748a1aa1ef4049b7277d689abf5f5e47f814773f131b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}