{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf5e89efb2cb3eea70cd00d0bb380180e7252fd2d8940f74daa03e2949e7b7aa0",
    "signature": "0x7a3aaf173fb3fbdd8d4172ca0498db8b0012a1fde3c4f9c7f8c6356004073a55371eb402b027328f8ada74d46e50d72d72ab15a5f43fd0392556f6cf39ac4a531c",
    "signer": "0x334928d7EC319B545378C7BB077Ad7A7970c11cF",
    "userId": "211337551"
  }
}