{
  "manageEntity": {
    "action": "Save",
    "entityId": "179643445",
    "entityType": "Track",
    "nonce": "1786482506478205761",
    "signature": "0x190175d356060fc9d3f3e60dcc2f2166049d709b9bc949f0713c568f52f1b8c420432e6a57868c45b3f7cb4787a508944b39da07e7b6787446e72892ba03a1151c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}