{
  "manageEntity": {
    "action": "Save",
    "entityId": "208565234",
    "entityType": "Track",
    "nonce": "0xd14b8459ceb11e009a724c4950dfe5bbea333edcea9178953c20aaf4fecf4a28",
    "signature": "0x6691c596498a804ac7d5502b20fa4a7a945bd4c5fb4dc39ca49274110a2279e971a01a033c07b3fcb8b98e786b509e8590ca1600acfca6d4d9e8e6e17b907e7a1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}