{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111484",
    "entityType": "Track",
    "nonce": "0x7d26d09111469ab0de78f9163bd6eec790c66f2046073038ca900ff1f7ce6148",
    "signature": "0x6f79dc7abedfe2f1888be7cb6c9c6f48679d69bab395d1fafc484a82e39da8ce172d24191f01803b9722f55e604e42a83b1a785d815fa1c00821bae17fa3da571b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}