{
  "manageEntity": {
    "action": "Save",
    "entityId": "398264746",
    "entityType": "Track",
    "nonce": "0x0428b5470a5b3b47aca75916cb0b9ebab199ca3538adec365d00e4b4f2e55b16",
    "signature": "0xe6dd7d429eeaeaa5492d76a63b2f65ad662eb8c19c36d934ef5d77e1c4a7ed5f3ece11423ca6e85674e5ce9328430a93a78dbc6033b79290df7b740e516311d91b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}