{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "654",
    "entityType": "User",
    "nonce": "0x7a34a42e7bd05f3508f05742c627cd0d5309b2028ce684886214e7c8cd3f6c22",
    "signature": "0x4e21b4be09eb57cdac978f1888d22f6b906940d5edaf8856b635ba10b85cfe2b78c2c3506e319ff2697550e76af71c1f04fe2726372d95a121f772268fb71bbb1b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}