{
  "manageEntity": {
    "action": "Save",
    "entityId": "524897849",
    "entityType": "Track",
    "nonce": "0x4e9bf81fef3284380ca0f50e170830fc7167cd8466fb5a97b687d4c1c6061a12",
    "signature": "0x3be86e9b18b57e43676b36c33ed66abbafa7ed19eed9625b9a13b0dfd3b7cb9410b349890519893101ca5bf9c3bab8a6c94562aec9aeec3588f219ddcb99f0411b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}