{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216847159",
    "entityType": "Track",
    "nonce": "0x4752de1f6e59affe2c746429bc91e44d9e696c8b54fe0f8ac3438b75dd039ba8",
    "signature": "0x1de12395da504341b909531565d16fb40581bc67cb99ef98b4aee602b4e74b630035c498fb3cae51d45047111161734543be0c7daaf2cf3ffed11ad25fceeb3b1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}