{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021158",
    "entityType": "Track",
    "nonce": "0xecebb9c53cd882eab396488d5648d0644cf7a6dac751716457ee600c580742ea",
    "signature": "0x67884b16d86ad50f3a8915355037b33629b0bc138f41334b13ea4459746a016f7c226958033ba482a31cf7814b026243ae4acfc84d285f00840b687cdbc777f61b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}