{
  "manageEntity": {
    "action": "Save",
    "entityId": "1049499",
    "entityType": "Track",
    "nonce": "0x51cd658f8663e68e6f9de99996e129f1d511a5858810ebd54034d2bbb9b0681e",
    "signature": "0xe4ea7fe8bc541eba642cf0b7d6bb58eac777dee9d657aa3b74d6e5002f4f2445539e8b0fbf3ad6afd83376fac94a6b7adf384b7bd939cb75ab5551664ce4660b1b",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}