{
  "manageEntity": {
    "action": "Save",
    "entityId": "1266698361",
    "entityType": "Track",
    "nonce": "0x655307f38b227bacbcb0875a62b0e3602bfc922a6631d871533c9444ee569c89",
    "signature": "0xee815ac5dba5b1ad98d67ac318fd6419da510baf369953b01a524a62a0c09dcf72f39dbbaa73bb68bbf003cb1e411e2a4d12606b869600a59bb3625b283d4cb21b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}