{
  "manageEntity": {
    "action": "Save",
    "entityId": "205478147",
    "entityType": "Track",
    "nonce": "0xb18f137bf537b10a4be159ced548526fb1fd0e2e3f004daf8bd0c1196f463f09",
    "signature": "0x43ef1ceb6152acf2755d4ccef2979d0ad2a0a3ed0c99ccace59c5b5f882e3f1d2eb4be168ddc7322ac088e99d6de15a26373506ad42f649c41305d37e9ff0d551b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}