{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807665344",
    "entityType": "Track",
    "nonce": "0x20b6351b3e11ab6d9fd0af685e6c27483af9ed2096549e3389bc9d00a0bc8cef",
    "signature": "0x11ee6fc0a5871385e9f640b95054e1f82c46054f9ce6cd8cc7d2492d1cde84903734aeeaf09e9a5d0af345d34114c8ec2c134bd388b2bf59992c4d401070e88b1b",
    "signer": "0x1D0c500EC847246923045cB0a285242A93723f30",
    "userId": "302385956"
  }
}