{
  "manageEntity": {
    "action": "Save",
    "entityId": "790842992",
    "entityType": "Track",
    "nonce": "0x671f286f3f422c21d3f15febdfb350e82fa52873f717d6f39032e0e73f8a5c77",
    "signature": "0xbb0d22b70e0e34a822929d833434286d156ac66fd6e16f29e96b20c47dff88c818380a118bbeacd8cc8f2ef40650c2b0d224947b2e7f25d2631060fae36b407d1c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}