{
  "manageEntity": {
    "action": "Save",
    "entityId": "1727600915",
    "entityType": "Track",
    "nonce": "0x1d4e39ae46c779b8ff371c8e7fec3dd04254ecf9d23037cf1f658b7991de0fde",
    "signature": "0x24e4efe689746c075c76074e4cd028a3e9bcf8c34942e46d33dcb818d40919ba58b2cbc01f90dcdeda6440fba1edd7901309fe1b0d1fcd8ba1bd31fa518648511b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}