{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd8bbdbd61f5893e0d951c3ffe1684fefa92bcceea0c0e07e9892e1d4d9acdb07",
    "signature": "0x2781dfac7a5aa1a5e77fd00d0e60e6799eb4a478f2c11aa6d814bd62cacc90da41bc516d30db6ad90e8a9110ba87cfa9f09c9ad17673865e9be4d76bf71b42441b",
    "signer": "0x61d5f943Ff590F4D8d843bd8E5d34816513DE0De",
    "userId": "500234778"
  }
}