{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "278837",
    "entityType": "User",
    "nonce": "0x73fc0f8f68c58ce752b69be3f34ef91294937645206980ac8afbeab7c6b083d9",
    "signature": "0xd41004e994802323287a9b8495c3dbcb19692580f9d8ad96edf89a59cd658bf6389a5fb288e1e08241a6afb69f3ee03a5915f52270083b51a5bbc4479ef223991b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}