{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004310021",
    "entityType": "Track",
    "nonce": "0xe6e2b172efa7816181f4abbcbef8ec222f0d6eedda7d808266e15b21c2aa4104",
    "signature": "0x86bac84c07a7cfceabee7a892dcc3ca92e54afb82a0a01b823e57441d0e0059853ee850a7ec878a33c0be86d9d87f5d63c2e32d3a538fd7fd08a4bf0c647bdc81b",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}