{
  "manageEntity": {
    "action": "Save",
    "entityId": "2040254626",
    "entityType": "Track",
    "nonce": "0xa393ce61d86abc4068746db619784d7cee023addc7750d5695873882ce6df344",
    "signature": "0xc9fdb94155b9361649c132557d6c291ef9080d3ca9959149c071ab45bfd93f9b3c94989487be1553823fbc37ae57093620a18bff2d87fbfe54fdf675de65ddbc1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}