{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462493558",
    "entityType": "Track",
    "nonce": "0x22e8f3ce49ea5cf42ac2b47e765b516aa70f65511886d9fd3deefb4c2aef95ef",
    "signature": "0x12a0cdec2334fb4ba02be9d76503e4cc5a3c77e00c01ed9e50ed4590b85f07e526fe2d10a200a5afcb4e9ead4d3e4cd28ab28292c2809acbbf7413fe099dd85d1b",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}