{
"manageEntity": {
"action": "Save",
"entityId": "413125947",
"entityType": "Track",
"nonce": "0xbda6999f21572e61b42e55952f9f5fbc1dab7c4526c6db8cd5f7f38c619f5f49",
"signature": "0x83bdcdbef2b0d12b68abe1f8717d99bbd0c5e96c95a1b07e0b0534c655e6b596633b28bf8d59911fdef4a75811fc4147c39ce5d4f2089c8514abbf7a760670471b",
"signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
"userId": "667809204"
}
}