{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa8190c4b1d651b3f0c1e4e48c1128ad754c00baffb7a6e41769ae56c1684e0a9",
    "signature": "0xe2dcbc6474ec724c419d927ea4d0342e58fa2e8c08a319d2340be9e99798ca9d0f620dcbb3cf3d1c2c556157aae45e1ad5188624ae5f9cc2f3b2efdb66294fc51b",
    "signer": "0x14134DBD05b0516e684ac164fDd5D3869ACc2388",
    "userId": "305860963"
  }
}