{
  "manageEntity": {
    "action": "Save",
    "entityId": "799748391",
    "entityType": "Track",
    "nonce": "0x44663fa580c30f578e21eeaf496a517c24f4457ee0b85041f4e26d0109275b88",
    "signature": "0xc28e5dc5631fbc3b9faf1af1c09878bef01226db25341ed619dec6753cdb667f3c5d343441d84975c2802bab1763a2a3d8e2d3dcd3dcfb7fc5a02eaf03b51f111b",
    "signer": "0x031768c05F8AC66fdb9B2516e50f2EBfEc351dfB",
    "userId": "403976571"
  }
}