{
  "manageEntity": {
    "action": "Save",
    "entityId": "178658238",
    "entityType": "Track",
    "nonce": "0xcc7a91dd48287e9d0b2a0b5ab579f54afe7a1d8c41fb40472e8b68e15151e90a",
    "signature": "0xcce9b720b36a294c14e4c3f2f1ce88cf68aa8fe99e35fb16ae74057294cde6ab69de511b9be58f43b3c95cb39b8aa7ae2ec9fb1d282d56835cd6cd0b7ebe8e2d1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}