{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595984454",
    "entityType": "Track",
    "nonce": "1792755888884522842",
    "signature": "0x81e58f0bef65dde4ba6c0401e624255604878962683169353b84257ec52573fd4eae8e2dc8f9206eedd88f5d8de14153d0245033c8bcec56bbd35445725856781c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}