{
"manageEntity": {
"action": "Save",
"entityId": "953832991",
"entityType": "Track",
"nonce": "0x64ff92b0d91c78e396cf1a75ae569c6a0432da89cc5a3f39ddd4a3a3daf6f65f",
"signature": "0x387adc040d4f06cd90c0c76cda8f1f5a0ce19ea6df2ce8fd5ff469c0b9de0bd239a94c6703c03dd67e7fbe1fe71d4d9c1bc9b5888510c512e7920301f40fa1021b",
"signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
"userId": "889450527"
}
}