{
  "manageEntity": {
    "action": "Save",
    "entityId": "767939415",
    "entityType": "Track",
    "nonce": "0x5254e473770eb3ad9a6f2441d0b7266d9ac8942eaeb01ce78c800cb5ea5812d1",
    "signature": "0x4111b7e390e1c325f06bd2b8a43d182709765c94722f5e39b19abcedd0c7d8c3751d082fe6917c498aa9f24277704f1df99159e411da0b14975834091c548e291b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}