{
  "manageEntity": {
    "action": "Save",
    "entityId": "153817156",
    "entityType": "Track",
    "nonce": "0x077da0f602a5f03bff7476fafe962a4d2a520a21b66e9a65aaad6a6f441b48da",
    "signature": "0x86258b9f1df0bfe3f1259d9f24e8a5ed95ccebddb6809dbfbc43aca1c0a665037fb955e077267d8ace0e8ca82be79fcb235a4d2e3930589a2c4756a20ef947fa1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}