{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441166996",
    "entityType": "Track",
    "nonce": "0xbb13cb1dcc531e29d19014f44298ccdedf39678d562075e58f88e63237c15d1d",
    "signature": "0xff6db68b8eaee109e90694f60093a4e0439fcb249acff41f52f8915b636083ea6d6f8e697e20f99eedbe6436e06c00764832b026dc4b350a1139e4bc13fa6a831c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}