{
  "manageEntity": {
    "action": "Save",
    "entityId": "1179673494",
    "entityType": "Track",
    "nonce": "0x2f1601fbea5a9b82fa49ba4409d3bdcabd8ac2ad324b488ed5592d653eacee52",
    "signature": "0x1309e9b05367b5f48320848d1632ea4c319d96ab66803dcd01b78aa2d2137c27381a98d1d6fec0f6ce2d9379432f30122e5d32c73cbbc48040aef24d6d6600dd1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}