{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15587",
    "entityType": "User",
    "nonce": "0x7c921342f15aafc2c6bcf941b683b0d149d36442972692ea991bb1d13a7ee84b",
    "signature": "0xbe02ca22d2e1335597c0845dcba17390ead7718d28ea981316b03cd2c0344ef447d51b21c3511a40a488ad1958f3fb8376a7a5c290fab59d536a1a764f104fcd1b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}