{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x815a477c6d1fb31117394530cb21358d64b7c8323f05c31a8beb15ec794fe3f9",
    "signature": "0xfa5ed7e5bdb824fcc9f0a989267a254fe4c43be1549e08e1a326ea360015c59b612cc660648ca85d3f0d5175250c809fcf95a229fa3239979b393ad7be18caec1c",
    "signer": "0x217581D37183744fBaF58A6537666087833DFC4d",
    "userId": "123886482"
  }
}