{
  "manageEntity": {
    "action": "Save",
    "entityId": "942582",
    "entityType": "Track",
    "nonce": "0xe13ea5e914c4853eaad0ce6817f8d5daa9d62e306db26d7ac0bc1c7386074707",
    "signature": "0x0d4e73e448acd3ef5c11636d6029547a661fa79152c37650b0c601562bf4be2b12958e045169979c4783afae7c5388edbe8fa987deb46b11e8e07ac37fb4e8721b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}