{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0xa824c64ccbc6d1fc6f45601e6bf8f8d7461d579b67da90beac9cb72dcef428e0",
    "signature": "0xa934a16c48b7ecb9b2f298ebd4682365fcf89996167dec2a6570f65c4e0cc38c552a01cc103c0094f47cfc64f63f0ecf506f7e607680d97f0a611f17390680d51b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}