{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969738750",
    "entityType": "Track",
    "nonce": "0x4fc71902f93672c9fa16babea604421a5b96ce100887c81ede93dd16ccfb2fc1",
    "signature": "0xb6558e4a6c81d362a856bd4b518867f4a7caa21a26c7dabdcabd9265ae1b863b1de63f0bd9f6d058a7ebabdad57bdc08a71db1853d5eecb98bebdd02d67717c81b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}