{
  "manageEntity": {
    "action": "Save",
    "entityId": "1143340318",
    "entityType": "Track",
    "nonce": "0xcdb4aeaa09f903cea1f54a4367fc3fd00eca3540a448bbfb148aee39b6399fb5",
    "signature": "0xc46bdf933b15a92d9ed10336da071a6896f57c8bff91311ae6ef643228b6c6b142d64d66ba8f195d39e102200386857b32a1a11dacbb88c168907bafc4b0d9941b",
    "signer": "0xd14727622fa26ECD6Ad72cADB6b96823f5fb65DD",
    "userId": "173494086"
  }
}