{
  "manageEntity": {
    "action": "Save",
    "entityId": "43006759",
    "entityType": "Track",
    "nonce": "0x70e4b68c59b2f53ab205042598eb1ded664e71393a89fce6333351896de390a2",
    "signature": "0xa13ffbc9b7f5739622647d535b6c29969f67bc9f63795cad3609331ee00ed7c145f003d4fea82f0a0293d7ee57715a1be37e4b7ae5d69df96c2edfa12bb1af121b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}