{
  "manageEntity": {
    "action": "Save",
    "entityId": "1533356746",
    "entityType": "Track",
    "nonce": "0x9c3eceda0b10406e361833d9305745c64bc74023c25ced45b8bb955a8549a12e",
    "signature": "0x125e4ef1c2821a5c9f6158e5f8ace2012752508bc8c985ac0045db97954e00a21af73aef6063a260a6d2cb5a9ae68abeaca4aad22ed3ec5e8c3ee65dd3fc3d4c1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}