{
  "manageEntity": {
    "action": "Save",
    "entityId": "1479691486",
    "entityType": "Track",
    "nonce": "0xf43a5902db6a817b8b10800c1d2a460ca1fea19a2ab97203aa9a2c8a984760c8",
    "signature": "0xeffbbcfa3297280a387d4928121491501bd4555fe2d435dd3c715f54352d0fd41b4fdd87c53434c2e8f721ad768ae673f72f7834f03646c32748beb5fcfa6ed11c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}