{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915808321",
    "entityType": "Track",
    "nonce": "0xc385bfb7e7b2d6e781838b03a96838eca161fc79f8b8243511f3ddb3c91807dd",
    "signature": "0x19f69a79231153963778211dedf69c6f98f7f8d32235c55f9e5349fd45c78fe53c1cc9ca83f223a696a14e7c1e2daa1ef6beef109fb34b9a553989a6e04b026b1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}