{
  "manageEntity": {
    "action": "Save",
    "entityId": "917653082",
    "entityType": "Track",
    "nonce": "0x39250339ffdc622c0dd02b7cc219062e452dc3002b45270db30dddff9472628e",
    "signature": "0x908a3a1cf76ef835ab73a1334831b41711f8cb1c957391fd529e0f9aeffed497583f8f11e38bc7cff7a6eb7df48dad79205b1d1caa80834ee5057dd0fd9cd9ad1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}