{
"manageEntity": {
"action": "Save",
"entityId": "1267972721",
"entityType": "Track",
"nonce": "0x7022b15a892ff07f9c7ab7909309fb8dcce002165515513ad0b9674836fabf8d",
"signature": "0x5c57db55dc4deb926023b115abdb7cce515df035e7a72305096d05542484137e3826c71509a3967bbd8d40d152c6b51a49709c96cc12e82679b0fd66d46445721b",
"signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
"userId": "490478463"
}
}