{
  "manageEntity": {
    "action": "Save",
    "entityId": "1251994370",
    "entityType": "Track",
    "nonce": "0xd99ffc0c7032e263f70d692931f09b33783c91d710f5b9c89c9872b9de9ec19b",
    "signature": "0x5d6dd4c7d6ddebaf195562912cbc96bc835e23c41f76aa02624f7f95e3e7e7f0657005c6ecb90e65da41077cc8b0aaf001d3421077357016361e171f2d0fa5ba1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}