{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177434653",
    "entityType": "Track",
    "nonce": "0xe4a60740a89722f6872bf97c6a810a7a8347feff76b816e6e45e85f132a30d4d",
    "signature": "0xa94cf39b46a27ea67611d0d1efd548cac62e187c0029c3a265905dadce26331f222276b69dc2ff9b6804539042f15036fa7575528a39c429990b41af35f9572a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}