{
  "manageEntity": {
    "action": "Save",
    "entityId": "2102674187",
    "entityType": "Track",
    "nonce": "0x2f13c0cb2d5ce7a09bd986c4bad94c803cb8c86833241c209e9e802ac5de751e",
    "signature": "0x4b99ced039bac692d69ded855fb8e49333a2e640efddd8453dcc6bfd9598bace71857997d6d9e754d66668ae118cd1faba377dd948304c9dbebd5e40d53919961b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}