{
  "manageEntity": {
    "action": "Save",
    "entityId": "1972947245",
    "entityType": "Track",
    "nonce": "0x094c2e4e464aefb93ca752e71e3d546da293f3a87490c69a26d5848b84f68d1c",
    "signature": "0xa9caabe7fe64697eb4c2465b70d42344a32e7512191c0297b66bc92e3661f8f505570775c28dbbc0e5a0281c6d9a6ae1c848e5019979bf33034141592d9084211b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}