{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "667809204",
    "entityType": "User",
    "nonce": "0x3237ee0e16b91473894f97010c66d8512811e711fcd95babdbcc62179124cdbe",
    "signature": "0x4b60cd1d440e7054e76bbc33979341b217ebfec0eef50ef48fa88a79b4d128403dcfe978f1c59bb7b78522d8a1178a1861e3631401dae85d33a9c53b9454842b1c",
    "signer": "0x854726bE5910ceEe19fBd2D4CE0518966CA41382",
    "userId": "124312"
  }
}