{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953232342",
    "entityType": "Track",
    "nonce": "0xe6adc7d7ca635fffa2aaac168dfc419386506feb7b55b5f6742e4086b2fb1fd2",
    "signature": "0x502586054990cff20843bc7bf479c3512e7e19598e55e9ee45b241118d3884a71cc8ac93bcc40e1ed36aacf19ed18656df759a6040c32a6482822550d4e4465a1b",
    "signer": "0x9FA029c6E43fD9781215e024e9ae5802602Ed2Db",
    "userId": "738673571"
  }
}