{
  "manageEntity": {
    "action": "Save",
    "entityId": "1578928502",
    "entityType": "Track",
    "nonce": "0xda8c5aafec2d4625df2829dd85f0686993bdf56b45293267f545b2a249600fcf",
    "signature": "0xdfc3a2f55b4aa85dbabf99540ff9d84c90fe286732272fe8c968d5026c6260c42fc82a710b07ea6b51b47507247bf00be82b30937c5f96e64efbe8ca6056b4e91c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}