{
  "manageEntity": {
    "action": "Save",
    "entityId": "415022",
    "entityType": "Track",
    "nonce": "0xa14cf6746086edd46326ddc2dd284c6881ce1c586297294b3f751095b9c06f31",
    "signature": "0x9fbec0a179b1cea9f0262cd5057dbe8004b31a658f716cbd73ee65bcfb191d5617a6763e76eeaf51c36642d9627ba5392b603765a11841fa1145b20bca9e3e8b1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}