{
  "manageEntity": {
    "action": "Save",
    "entityId": "890050953",
    "entityType": "Track",
    "nonce": "0x62f055eba0803ad91bfe2cf1027a32e7246be27aa87371233fb8dbf68f7f6ac3",
    "signature": "0x8237e994250c08c32d5dc22b339a6f1088cfeba47a1fb9fe0e9ad62f7663138b02df8bc7ee1e82c12b1dbf02397f00488caad377baacce2fbdffe722c01057d61c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}