{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047595",
    "entityType": "Track",
    "nonce": "0x36f65da021ddfbdc4782f2a1de0dd6d31a3251850c197625d0129a920852da7a",
    "signature": "0x8ae5ba44de44d253f5f1b13bd25377a5b88edad496954f1cd811aca75c6018af5ba1cac732bde0f90215a4c238effb5a6c0f1a917ce1120bc358752ea86addc41b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}