{
  "manageEntity": {
    "action": "Save",
    "entityId": "1162513746",
    "entityType": "Track",
    "nonce": "0x952e45c36b29655396a54af2da97f58212c17a60b08973f0f9898f898f64565d",
    "signature": "0x7403e9a0493b0cd2427e82e1579a79844d25e400b0ad932d41f6cb8e5c6fcc3846251d635feb0aaf4167c0306035f018b692abcece6d9f9192abb70ee98de05e1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}