{
"manageEntity": {
"action": "Save",
"entityId": "1372738118",
"entityType": "Track",
"nonce": "1792687265840863412",
"signature": "0xc31feff545827e7545647c0e4bc4fe170d0a86017864b9b1f0cc1f932596132d05628aa941c45df2b6cc7e20f0f1beee9ae5f12f63596f65d88871e7e11adacd1b",
"signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
"userId": "451691735"
}
}