{
  "manageEntity": {
    "action": "Save",
    "entityId": "271305",
    "entityType": "Track",
    "nonce": "0x41065616fa7b47c85835b8d9f9917480367d6e8bc7131cb5184ccb106719ca86",
    "signature": "0xf3037e2e3511eafe151627481075a70ad1d55c4ea51a2e7969dcff7f76d220d4203d92160a6ff4ee90eaf3a3f82d56d79bd9021ca2e924ed7e23ac73eeddb1db1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}