{
  "manageEntity": {
    "action": "Save",
    "entityId": "798867083",
    "entityType": "Track",
    "nonce": "0x5691f72eafd4d89881017aef946d979dd4e0b3d837b3e92808855e95c38edd4f",
    "signature": "0x659b558f2a81607bc66b29d4a3eab9ead15c175a96987fa2b493793ae5eda7582815adfac22975b91a0c76d7a0024dd35cb5b27e47d1ede9faffd566da5c63cc1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}