{
  "manageEntity": {
    "action": "Save",
    "entityId": "798474905",
    "entityType": "Track",
    "nonce": "0x477c4f1ddc5ebb0cf9fd2690c791d4808fa2daeadf7c77d6e75f9f8b0313c941",
    "signature": "0x62ebd6eef48e3121e79b663823fff4d9581727fb13f57c75b1eb52dcd30841d301ea2948a9f9e8e88e73ad3fe5e151aacdd40f1c2c492d9beae390a9f1219feb1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}