{
  "manageEntity": {
    "action": "Save",
    "entityId": "256427",
    "entityType": "Track",
    "nonce": "0x3d82ed51ad720d1aea760940d9a2a0ae34384339b89931b7fbd78994d2587509",
    "signature": "0x4ac7da6d4ba723934ee8fb5f460b5c34f75eb08aa64cb763368554819dc178cd5ec1773c8fa530928e610ec6bac2acc247669a25292f3bff6b167636636c20651c",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}