{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "111",
    "entityType": "User",
    "nonce": "0x52138f08b9983709b058f294dd8173f6757d422401d586f9b453c723c895ee03",
    "signature": "0x2217fb4410b9f0936f3f280e9608a720e2564b76a0cd40098f5d3a8ded955d3c4f8bbf678b710ae23b1c908e1b7414f5d3a9fe311dc9e07d7221257cb68b5bfa1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}