{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8f5a4f3773eaec8a0bcf10a8cbff70a9b84098e4948041f6c15678ad134c043f",
    "signature": "0x26e14883c8f6dbf0b63a69705dd659761fc49484a9b95fda12622ea9cf01584e618e97fc6e7ad17bd8ffae9b23fdb871549db7980795c743a6197f0585293a841b",
    "signer": "0xf15FD63403ea1176eaa213fd9354417c325a643b",
    "userId": "813142179"
  }
}