{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896374671",
    "entityType": "Track",
    "nonce": "0x7d6331b034bf06aa2812f4978fb4cc320375f3642aa2feee5ccf3d21392b8361",
    "signature": "0xcaf9016a8096e6ab271986cc3bed324e490842c82e2456d84e7b07f440d490e42db36d9ecd786833d6970ea8941a087ec86f56fbad37715f34b5f0413ed3fbf01b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}