{
  "manageEntity": {
    "action": "Save",
    "entityId": "230696",
    "entityType": "Track",
    "nonce": "0xb9a9986dc053bba023cbc14553c7756d30ed18b3ef9a90b221e0cd462798b7e6",
    "signature": "0x6bb62b653cd720efa031dcf0f4b3380fe05090c85e3821415eb7a1fb6e74b32734e4c7fab88de274599864aaaee239dcfc7cc410004cb59ea14e1ff1666f7c511c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}