{
  "manageEntity": {
    "action": "Save",
    "entityId": "840943086",
    "entityType": "Track",
    "nonce": "0x6f7f1dc4f5240fb79b30592513490f27b12b57ce722ee1883591fcea2e5e1856",
    "signature": "0x41f5b72c9fa3d3336f5af033d66b60ebb31c55269b307e48ecb68e05954709c573e2ea16310f07706056ebc0dfa6e8724268287dbd3e4a788e7d3bff7cc4e4621c",
    "signer": "0x92a5082636c97Db0Ae888484D85e4c8494A3B791",
    "userId": "895527427"
  }
}