{
  "manageEntity": {
    "action": "Save",
    "entityId": "2064704843",
    "entityType": "Track",
    "nonce": "0x455d54d8de3c65abff098b3352d5beb2e263e1a96f5c251f4b2a67f80b7fcae3",
    "signature": "0x80ee5756fd768a6278c82581641f640acdb7c8f9a7269e88b3f4297b99bd42d371d296683d3b86407b7b9d4adcc51720416ff4f77a41a7bebd093f4376f3f3f71b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}