{
  "manageEntity": {
    "action": "Save",
    "entityId": "261140000",
    "entityType": "Track",
    "nonce": "0xafe1bdc526132bdddc42240ee7b8bfaeb8229f50ea72bab2a91bb0a6fa1ce92c",
    "signature": "0xdf95616b5962a307903c9e32d3b4fba344110c04886a322f0d6c9c3f389bcf04536093119431bb42a87084932e279069884bbfb827cd63cccdc3bbeb22454d861b",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}