{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "700531000",
    "entityType": "User",
    "nonce": "0x73f65d073c41ad5e31251132a3822376c523e4e7969b4046cf6f9ef44546ca0e",
    "signature": "0x7b9cdeff9d3a0ccac9f74c96b5f78a88b247564fa49245d1af49b42079c9d6b0154ded07a2f33185c1ac0cb9c6300eed5c60e1d133ad0301bad48b12a02eb29b1c",
    "signer": "0x720537125Aa4b451266209E0d508D7576a4bAF94",
    "userId": "942771296"
  }
}