{
  "manageEntity": {
    "action": "Save",
    "entityId": "402213809",
    "entityType": "Track",
    "nonce": "0x27db66bab87d1492ca5dde55f79302b3345b692edf8665f5139789f9c0b0ce66",
    "signature": "0x61f804bf42669f02f8a7fe059e5af68a75bbdd40c70b1b32fe35160d6eb7ee22625de9b40ced7c94bef74a9ffa9620885ad24cf2339e44e9cc344724b3f511ff1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}