{
  "manageEntity": {
    "action": "Save",
    "entityId": "694809",
    "entityType": "Track",
    "nonce": "1792290917834385523",
    "signature": "0xe9626966a892aba0a84d28ba4da6ce84336e307f98bd500f4c590251577e82f219b44d5896083d10cbcc5426248bf0c00e614b4f4de6a8840400a3dd55cd80531b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}