{
  "manageEntity": {
    "action": "Save",
    "entityId": "199365",
    "entityType": "Track",
    "nonce": "0x8f8f9b16ab1cdf4789675777ebcc4829320c24bf8f643c657c0dc20fbba9b70a",
    "signature": "0xa3b88a3d9713aabcdd1d2169e99b4c896188f9aa84e56069f0c1233a2ec5b89445db0b8b40ad13ff14dc6e6eead3164342e26d314ee45f74263d6140e9431b421b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}