{
"manageEntity": {
"action": "Save",
"entityId": "1437923772",
"entityType": "Track",
"nonce": "0xa1ceca54a4be60c9e03c698f3aa9d0a9c5b1d162944f8ac662e78027e95a863b",
"signature": "0xfff10ca726f334f1ee6e284d02b9b9be8d01a13a5f810c05ebe34d9be4cd442211cb3a64b8c4d09601a9153ab0c4b9a567fd99ed42b27314cec48d6b8698837c1c",
"signer": "0xfe73cd4bc8E45c5aC794633336A85475bD51b0f2",
"userId": "284924323"
}
}