{
  "manageEntity": {
    "action": "Save",
    "entityId": "798678",
    "entityType": "Track",
    "nonce": "0x928c7517d055e18b1bc3e4d97033f712d528fc53f7a5c6307f57f1d7dc8e2841",
    "signature": "0x7429985faf49660e545c8302cf529709f9edeac5471c01c48e6fa459ac3317d532fc7bec2bda02d726cec22da715b130d9cac7dfbfa366b074201da15f0f13121c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}