{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525568838",
    "entityType": "Track",
    "nonce": "0x7f14dc9c8e2f4d7df3ef21e2d616ffd12c67bf8badedb6760122d2a4d4fb70d4",
    "signature": "0x86595a963a6526eb0e11d17e909643e2209e236c04bfd1e51c844bff663512ae48ce02c5e829338424b71000d0f1f4f29ad021b655bf45810198d8b040466acb1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}