{
  "manageEntity": {
    "action": "Save",
    "entityId": "306615",
    "entityType": "Track",
    "nonce": "0xccd4f10662e1d6a337b442bdfcb67990792835648dafb4154d0ac9620aa076ef",
    "signature": "0x1997fb68e2be05b17660993822eeb886c8b0a4f43b05debe5d13ac80d66b56cb7237b3db2295f7ad31b0e34b6edcbf70a0e0410019625c984e1cf9428a13bf3b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}