{
  "manageEntity": {
    "action": "Save",
    "entityId": "341678744",
    "entityType": "Track",
    "nonce": "0xb7a69b0e549e712109eea7a7883f404771e86bd835299752aabed79d056d2e9b",
    "signature": "0xf8e3a5d3c77ca2f7013afaeee9c216323ae2810c9dac2b312e3e2715525296d1277fe7b965885cf5db82fbce5e3538bda381150496a49ee1c50a5910a251c5b81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}