{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75591",
    "entityType": "User",
    "nonce": "0x09585e7d11be187b2460ac665d0485c347bbde6a615c816aad362ecf23e0a1fb",
    "signature": "0xb312bf94414870ec6ce73171e818f32a0bbe54fb648894447b070a14e1202cbb3d693aa6a3d9083e3c99c1812f9e39c3ed2fa7dd58a3d8f5a340d9bd6c42635b1c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}