{
  "manageEntity": {
    "action": "Save",
    "entityId": "2058043941",
    "entityType": "Track",
    "nonce": "0x8dde9a9228ad298015564e4db05f76f5b6f66a0e61f0cd95621ab62e69c94a4d",
    "signature": "0x2f985eff6752b1a76669b30eddff1c71cfe4ef5f2721796e2dd6a0b1bd0d988959bd775e52c04316853a2493fe3169ec236af7b035accd09976b29c46cc9e8e11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}