{
  "manageEntity": {
    "action": "Save",
    "entityId": "1103193164",
    "entityType": "Track",
    "nonce": "0xde7c985ccdd49ee34d10323902b1524fa3848916ea32954f25b793b41821caad",
    "signature": "0xe9e63c2bdb49e85785eafc687d1c1b9ad29f1b83e65780961c48efabf52daca53c1a1daa58351613f468da69b415abe77ff1c7287f459462c47a33a268a3f4ba1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}