{
  "manageEntity": {
    "action": "Save",
    "entityId": "61943",
    "entityType": "Track",
    "nonce": "0x0eb01391f57ead814e860bf0230dd509489ebbc624be0fcc899525c665513b7e",
    "signature": "0x542b992d28f0648637f54bceecbad406ba7f1aabdb282a8a4d4da87f427e429648b5927922aa42f9fae465a78423065dd001b0b897397436414ee02bbb465bbd1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}