{
"manageEntity": {
"action": "Save",
"entityId": "373711775",
"entityType": "Track",
"nonce": "0x0c28ac3704c92bd725e9b932084bb58d7a4b2163dae761d2bb5c54c650694738",
"signature": "0x1ea57fe9b971ff5e833de1d6532db28dd5eb2f0abfd2b0609b33f279d3814174715ccaeae2c9c2f6d32b1889c3188a788df4a276e702a421b6350de1b5e84cf11c",
"signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
"userId": "670307808"
}
}