{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595859757",
    "entityType": "Track",
    "nonce": "0x214b2996b09fe3ce138b198673ac79d5f93c539a6a1cc8bdc73cbdc5ae513e30",
    "signature": "0x295988b60057c7cd7905a493f1a57fe04d77a518390f106b86bfa9f8d229ae0b445ef91b768e48ca15e9e9fcbbd17d95719fbbb3c7026cef29c15ca6a875ca031c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}