{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "335904",
    "entityType": "User",
    "nonce": "0x14e051b2b4acdfefcb911f8e01da205c1f34238a44cb874a9562b2c245ed00d7",
    "signature": "0x60fd880eec3825c80777a75568af4d52376557f9601668bb9505e8a1fd86cd193892c33469c13798c3a0871f64cd656ad7973ea734d6d11e23eb484a605daf561c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}