{
  "manageEntity": {
    "action": "Save",
    "entityId": "68646764",
    "entityType": "Track",
    "nonce": "0x7e5fce92a53c3894584efb7b9c460b5984d2671b103f4c963642abe7e16f5a5f",
    "signature": "0xb6d6af96ab90a26233b05b20c2e05aaaa5de83c4f0e3428d0c67d0ecf826f7cd68060b1b2af501da7e8d01a0c722dd1a36c09c3711279802f3e71b19296692471c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}