{
  "manageEntity": {
    "action": "Save",
    "entityId": "904882366",
    "entityType": "Track",
    "nonce": "0xb98eedc5b73cf80439bd8720a10197dac6c98fc2eb544068ae9991d58c107d0d",
    "signature": "0x086c6525d59db6e0079155841843363ec683885d3116df9d6a7f340ede522da77cd18ff13dde34dbf4803a3774646480b595a1ca5cad4ca30bd9032f5bf1f8681c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}