{
  "manageEntity": {
    "action": "Save",
    "entityId": "633201269",
    "entityType": "Track",
    "nonce": "0x6b605c72bc91bddafeba9933612d5f6de0ffaf39fe5ba4b79bec7e42b715b159",
    "signature": "0x5fbdebef4c72d2846fa637a7f52124fcbef52ed818d7a12dc5ed427b59f9d8f42648d18a95bc1e2c5422a76770e027b6ea4529f319e44da639d7f2c35d06b01b1b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}