{
  "manageEntity": {
    "action": "Save",
    "entityId": "329941341",
    "entityType": "Track",
    "nonce": "0xccf6528cca220bbee706dc2bdae46b1a4aeb13eec414d012ae80f71c388e8185",
    "signature": "0x5a890d55a873132949535f326d926df6ece81c7e506955b223e5a86e061578121b9a79c062c7906ab18d4e5b0c56c6369dac41b05fa3bb2a2334993f3769b0f61c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}