{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "19489",
    "entityType": "User",
    "nonce": "0x2ec212a9c99894e48ebf6af07d96f03c0543dd8ab9362dc305268653d5b2ec19",
    "signature": "0xa4fa1b1c9bf72cef687af2f35a3ce50ea4fb47a997e805845fb4f07062ce8aed5932d9a63ca5083059f9a4d28696aba23dd0cb32c90be5fa1a2d4b6a54b232501c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}