{
  "manageEntity": {
    "action": "Save",
    "entityId": "1056562392",
    "entityType": "Track",
    "nonce": "0x493a045d75273092e2922436330ffd29f15f0093012b5647a661a8289a762424",
    "signature": "0x49d22da2d7a0d33a52563418167dfc5a6129ae498f556efba182fc6bef9d7e560dfb711a0815503612a1e35c875f3d82c65a22197f9167c2efb6f0a1a6a026861c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}