{
  "manageEntity": {
    "action": "Save",
    "entityId": "9725335",
    "entityType": "Track",
    "nonce": "0xf2fa23b2ebf30e1401397aa354a33a6b976645e54db6d86a032efaedf691f5e5",
    "signature": "0xb263b23d2adb318dcd4f70fbdc6a831bd38864df00c4f7c6b6cf01a64e94c0b01cba0f80b515a5dbcfc817cf2cd192fe4992ab3ddb774c5cf3e8b83eea5c32e21c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}