{
  "manageEntity": {
    "action": "Save",
    "entityId": "322642881",
    "entityType": "Track",
    "nonce": "0xeea227f266866d682b17f5f8e0005bcd033cf1c97d59c42213c189c5157f2b9b",
    "signature": "0xa8a8f036c262b5208aa848f35ecb3c0cb13284b71e958ae3d37bbc7c7b25e4b55820ac795e7d270d47f89cba21f9e651e38b3fa0939ebcf2c1fcd3539cfde65c1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}