{
  "manageEntity": {
    "action": "Save",
    "entityId": "185655658",
    "entityType": "Track",
    "nonce": "0x2ab78e89e0559a53461c078ba5c5d7ef7d701cc65716071a448efbe705133e84",
    "signature": "0xdd33fb5fd16021b542e7470f53ac6e976f43f6c5074d6abd10f4208162b7e73951188c7dccfc0b9241a33f5395e3fe2f9b0026dad48059f9819f2d33f1ae3edb1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}