{
  "manageEntity": {
    "action": "Save",
    "entityId": "1698903517",
    "entityType": "Track",
    "nonce": "0x3014cfbbf517d7996caa4eaad292bce396cf3fa4b207034c5ba5e04d25e0a57f",
    "signature": "0xb4b3e77edd779d09bfb60c279dcc1de011406ac0d625cc71deeac09742985b326db8ed261ff35d7dcd89fbda4c73aa7f44d060f14ff8cd66fc83f122737bab941b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}