{
  "manageEntity": {
    "action": "Save",
    "entityId": "1851754695",
    "entityType": "Track",
    "nonce": "0x1c53fedce3980d0f18a3c62ab685cd39901e853798d8d48541fdc0fba2e1f58e",
    "signature": "0x3c3a2dd07d67bc94c6df3b9ecf8f9439636d23e1d90b48e23e2a913e1956d8305fbbdb60bcc0ff29e55a6457b08d6c34abad62b5d104a7169769b154b25d32cf1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}