{
  "manageEntity": {
    "action": "Save",
    "entityId": "426903",
    "entityType": "Track",
    "nonce": "0xb3f18de1fec4563127e2222915c251187f57e8f3061fab5833c86031b2f7de30",
    "signature": "0xbb2498fb65bdd5d1375188ce31a1d81cb996dd831b9a88d253e4b2f8e16737d10d33b321ec3849d9bbdf42f4a2f16ebbefb4baf6447fd08dac021aca217ca4de1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}