{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885440312",
    "entityType": "Track",
    "nonce": "0xf4e9d6ac1d0668e13c1fdfee4bbdbc98771e80dc44b8d104e9dce68fb7828ce3",
    "signature": "0x65f2563081e81e4bacfabfba0a1b02865bb866eba2d0fe35e83b86dde60cc3260ec2edd0e18b973a4d358e64ff11e1d548ce503a1af3bd5123d8dc71dd4f71db1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}