{
  "manageEntity": {
    "action": "Save",
    "entityId": "11925538",
    "entityType": "Track",
    "nonce": "0xe768acfa269f245ba9ff9503eba67e3a91abf7828017134d163cb4cf769c64a2",
    "signature": "0xd2da2e4802bafbb45d35a447a2ad29b12c3f46412a8d5cbeaab077c06fecbf3e5ece5396f5eb93298f4b9d945a5178a019baeeccf930b8ed1b34e0c6b55465ff1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}