{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "125412",
    "entityType": "User",
    "nonce": "0xc5f0b44c99860e0e4d9380f452bbdb39616be1dae5f909eadf6d6f3130b07e24",
    "signature": "0xf6e7f4f4d43d62565835aaac53c8285d288abb9fc8b3111238a76df9f144abdb78c5244856a2c661addb11e4612fc77f83f6afa5891edbff82c961b1507e09ac1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}