{
  "manageEntity": {
    "action": "Save",
    "entityId": "314771",
    "entityType": "Track",
    "nonce": "0xde5ffa3bf18815842fd68277b3efea1ded57228a4797489cbcc8d510327e55f9",
    "signature": "0xf480af2c03d0a93b6102a7d7ebc21715ef163a2da18501dedf701cb99c4e9e7878cd0751c0c0698dadf8aa1338f884f7153759567025fca5324a3c53a0ff987f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}