{
"manageEntity": {
"action": "Save",
"entityId": "678171082",
"entityType": "Track",
"nonce": "1792445777885953442",
"signature": "0x4045d6782a28a1718ad50ef7ae67e66a5988414aaa2bd5e5ba3cc61d9ff8f1460796854f2105771e8d8aacf4d24cb32cfe947ddbe1b50aea2e25824ddae476f11b",
"signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
"userId": "105562689"
}
}