{
"manageEntity": {
"action": "Save",
"entityId": "1390639154",
"entityType": "Track",
"nonce": "0xcbd521e66a64bed96770613ecfc4714719e04bb75d3e16b4029b3019c5f1e0e1",
"signature": "0x4d3281c14e9480a45d4b2cd43e4ec164ef538717ea0a3ef788478f34b26503b65564c43b479b39f20880eff6d593e9cbdffa13be383031c1b43db0dcea090dbe1b",
"signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
"userId": "370091516"
}
}