{
  "manageEntity": {
    "action": "Save",
    "entityId": "332831303",
    "entityType": "Track",
    "nonce": "0x99ba91871fc5d91d8821f0a3174f1a1f1c148c4d445641d415e490fd1439f364",
    "signature": "0xd25ef7520dd45f7a2b1eddedd7f64ab06f130e7245d1b56ceb2691dd73fafc570c6159f13266796e95dc5023ba644d0cc0a7bd80a7011d3bfce69491f328c56a1c",
    "signer": "0x5156122E7f53a879786546b3133306b9F7814b9b",
    "userId": "781663071"
  }
}