{
  "manageEntity": {
    "action": "Save",
    "entityId": "947516038",
    "entityType": "Track",
    "nonce": "0x8cee16106c0c160a7761189c0d83b15a3f3acd3429c5b4ce4112ea903548ee82",
    "signature": "0x54f17b6043a6d0d613c37d546688472161902ab1f084636cc1989bdf22c3e6606265d692bf4e13460d42194d142795bb3ed965f4c28144810d557e5ae07c3e7a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}