{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1b2ff7b985f1e8fc6c0bd6f661330d9626ef7774871ad5a7a551232b63918632",
    "signature": "0x9f74a6ed217fab9b3b22d5adc1939cded1d7de8d30f266300e451a38c4f6b4502048af3ce0184fe78a668ad82375d30c26d436711f39332aa35eea5d93194b841c",
    "signer": "0x878510CB0c61D96b6a56128f7c3f30516f239902",
    "userId": "524590012"
  }
}