{
  "manageEntity": {
    "action": "Save",
    "entityId": "1585043560",
    "entityType": "Track",
    "nonce": "0x9f3388055bf6ef97d4842a2569c929305f5ba68e4d81655675d0f82756afc936",
    "signature": "0xc84728c46064aa7a58b0b599edba8bcd92b6981a5f8409b2f2b89762431fd12f4fc29f5f275d3ea0cc8e2d0eb5b40bc36685e633a62724a7d269def475d56afe1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}