{
  "manageEntity": {
    "action": "Save",
    "entityId": "194530616",
    "entityType": "Track",
    "nonce": "1792530649561367293",
    "signature": "0x43a9dfee7bdc9803497d464981fb37fac1fc79f793a4fb4d4054ceaf288e88f53e2c87ec386e506b63d183a3ce54ba032f49d85bafc65e3ee4e2a73c41ee603d1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}