{
  "manageEntity": {
    "action": "Save",
    "entityId": "536907338",
    "entityType": "Track",
    "nonce": "0xb247979637e96a83800e2750946714f2b447178425d1afe881d3c70c4e46d971",
    "signature": "0xbf73fa86f09aca6cf38cc888d423d11c8f429a5ddc9c13a22abb4c88f468f8b90a01611e94b68f8f56672954a8757a425c4b9089e773c426319e848c1a4cf93e1c",
    "signer": "0xBBBE9eFc177a4E708d317195Fa81aA6E8E2F7E92",
    "userId": "557135181"
  }
}