{
  "manageEntity": {
    "action": "Save",
    "entityId": "1477735689",
    "entityType": "Track",
    "nonce": "0xc10844236d6190cfd4dd36be24514c9d05bfba6caeacda3edc4ba34aa43a519d",
    "signature": "0x1264186c1c689fe1a64a82a07b966b4ffd825accb1ffe84d8a8b46e13135f6ee54e2f6b38e0dc11dbc00e883cdd797113391b293e9deff9a27f130ea4c187ea71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}