{
  "manageEntity": {
    "action": "Save",
    "entityId": "573563",
    "entityType": "Track",
    "nonce": "0xce641588638101e56bcf59552601a604f0c4739560d0b0a06e7b8eab0cc230fa",
    "signature": "0x416246261d7f3d84bb6a598eb31ae1f4e18776cfd8cfab23318474f776db0eef46d22b93f7d1dabced76c7f04358cb5ac2836dc6d892e2b424cf8732bad813101c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}