{
  "manageEntity": {
    "action": "Save",
    "entityId": "934616554",
    "entityType": "Track",
    "nonce": "0x5dceaf376457d6e6d1877838b7296aaae9a8faaeb191e9d51a86e69fedaa29f3",
    "signature": "0x7c25c43816b035ef45f68ec71e949b85cb9b2ed0ea339c572f3d52b1559608101e7fad44d6bcdafc70eabd55f04935368b3008944837075017135df1faa55c021c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}