{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1921",
    "entityType": "User",
    "nonce": "0x4c69211c2cc21cf076bb9fa3e15f748aa6696d67b703d500bcb976d5ed0e79e1",
    "signature": "0x4b7a89f9a3483dfea55cb00f4da7f30566767c734ed0f9836b16c1cc8ee7cd903d8c49e38c783b2fe757cf87eab411b39cf4b977c70012484a8f1b7888370cbf1c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}