{
  "manageEntity": {
    "action": "Save",
    "entityId": "219411461",
    "entityType": "Track",
    "nonce": "1788209417175320502",
    "signature": "0x3327a63e56190a82429a32e9f7a48e2e679fa8c81b5ff2c125b2cea23e39eb385504a9e89024d048708fdd204c277b7ab3e6cc1448c776f94c85b7f24327d26c1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}