{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844699306",
    "entityType": "Track",
    "nonce": "0xd2f55199e4fd2e32bf53338ffeac543f83ef80d64e88b7a81eae4ab9eb2469f9",
    "signature": "0xcee07143df3a09b14df5e803b5a8637041ad14f4cc4e70dd68bdbc4390ce70386b25204563492961ffea01c000e72f7d6bb903d5550a890b4cb6e6852b4d5ee91b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}