{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346048277",
    "entityType": "Track",
    "nonce": "0xf887b48d7053743263bfff3fcdbfcc57ae6f75f0ebd25ebd047b68c7a929a614",
    "signature": "0xef3cf7428b6681f29f8418a3135722b5c7740148de9b9cc37c970be054784e772c1817f5b5842e818a463da635709c4a72a6638f714c9c4ac1a7ba64d66e66d11b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}