{
  "manageEntity": {
    "action": "Save",
    "entityId": "297590",
    "entityType": "Track",
    "nonce": "0x36d6cc64fb62812e8a83ef682ef298ed23fd927d9f171ffc15893f54626c8c26",
    "signature": "0xb92eb8c3e491d51dc6f7747990ddccd41005f34183ce76d85e085abaa970a2f511014211919ee852bb7ba862f75ead97b193e1c5ecde55ff5f1a8ab7cca25c2a1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}