{
"manageEntity": {
"action": "Save",
"entityId": "299119735",
"entityType": "Track",
"nonce": "0xf2196f8d86cd75bce6fd85557377796825cd38b991fa6989102c82c25e8a8b7f",
"signature": "0x6a3ff396568f5fae6e218cb79dcf47ebab153adbee3e64c6431e8c4ba4a39ce33aafb94974b12655dee37f208a856b91e2f48418c42747b91fa976aad2b38a0c1b",
"signer": "0xa22176a11BF6703EFe39D488aA7cC06aa781C44A",
"userId": "633924738"
}
}