{
"manageEntity": {
"action": "Save",
"entityId": "248559",
"entityType": "Track",
"nonce": "0x839519f38b2e2ef72ffe7bd6e0a1f830c1a7de2e86a145d7f5339da73c3fc826",
"signature": "0xd57d6437f2826b7843d66ed58b7f03a0d7ba35fbbf122a0f105570bb43fc63dd344008cf7c1da1cc26ed4733a37924e496bf57617241c78452fbb207670a9df91b",
"signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
"userId": "370091516"
}
}