{
  "manageEntity": {
    "action": "Save",
    "entityId": "678079581",
    "entityType": "Track",
    "nonce": "0x0026ae76a6c4bf41b6cf1358e17ed6b38151c3345095fa809d3859dd8687ec84",
    "signature": "0x4d8e40a60a6e8bcf31b63e1a7d8e46a4cede6eb04df55b8c35d51f492aa440e716f2ad1aeda6a85ca35f4bea8ba23bbc851a676e6556bd20d6c1a1d5fb930cd41c",
    "signer": "0x292eF57C1FAAc86008ab58D5116e0ba424C9189b",
    "userId": "721084704"
  }
}