{
  "manageEntity": {
    "action": "Save",
    "entityId": "298407860",
    "entityType": "Track",
    "nonce": "0xdcfb16960d25a4eeea4ac8698abd8e5550f644093017b02986494008224ec3cd",
    "signature": "0xde134e8604089589977289046b03c02b3e4b969ac35e7c93105e23560fcb7e5a1992980f05bfcc2021054904e6e4db4b15250542e5b2575cb97d20f5490686f61c",
    "signer": "0x2be0f08F6d992D6Ba1d55c9634D8B8fc25f9562a",
    "userId": "384670"
  }
}