{
  "manageEntity": {
    "action": "Save",
    "entityId": "25689",
    "entityType": "Track",
    "nonce": "0xdba8e40a8418847dfc1e18de6907970d0be5ad3920324aa070df638c02eab399",
    "signature": "0x202afededfcad2c40652737aa76ff5a67f51167821e08af4abe256385e59ed927c5136fc9541e08609c26e8b5b0b896f2c197caf72801791bbf301902cfc16c51b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}