{
  "manageEntity": {
    "action": "Save",
    "entityId": "1361526652",
    "entityType": "Track",
    "nonce": "0x124e559ddb805f15ec2d54291082bbca58ad0522ce93b1ba1257c31c95844343",
    "signature": "0x7e76852a7d6e22e4dae002732706a461bb801f863c8573bd675315ac2fb6e8fc6a6c90038731b4cc5087db5cde4225c88e08df578a6d2c6d7a52cfa3a204734f1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}