{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "336974",
    "entityType": "User",
    "nonce": "0x8f03e99843faae85ce6d73eca10353eb475a4b58381e70f9b481868db32b4ccd",
    "signature": "0x342d556b2bcf6c662c469cd1a97203c3756685ed0db0457401e90b75f44a9f281342e286ebdc0ab1b0a65bf9e28802c792a4ba5b7fa88ec75508294f6d2a71731c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}