{
  "manageEntity": {
    "action": "Save",
    "entityId": "2145740277",
    "entityType": "Track",
    "nonce": "0x65aed3a0ebd73fab68dc52bf05674b517fe310b701af4c8dc640c28e4b4655b0",
    "signature": "0xb0c52b75f35081ede329a53ffe211dc55348fd3cc700ff811ae2fce78eaf9d21089ffccdd7ad6280fab5d29d5988381053cb545f094dacc1fe1e2572d8dd598a1c",
    "signer": "0x0D118a31B964e68f3E82481bC1aeb97846819006",
    "userId": "219206868"
  }
}