{
  "manageEntity": {
    "action": "Save",
    "entityId": "218047410",
    "entityType": "Track",
    "nonce": "0xd5629cdef90398818aa9a82e3c721e0bda599b627e56be3acb6da2fcf5f9e785",
    "signature": "0x5bdd9274adba1ac2f8cd5701acda7f68eed49cb3f6628f41fb9830235db274043007ed8dc69795d2aac86f02fea347d2dd6b1e65bcfa13e3a15ba6f3acdc5abd1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}