{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319458",
    "entityType": "User",
    "nonce": "0xb28edede64dde3ed8739a5a5679d912031109c1110f6e90a77b02a327d1a4b16",
    "signature": "0xf8281b45d39e4fe2cdb121ce46904cca73a244d030461b283e7de5b0b47fa516287c434a236d21d2dcb85483effc7cc9c72af2850ee71649e46e851553a3204d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}