{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075782",
    "entityType": "Track",
    "nonce": "0x7fcd6af84c90df046ea804d2a1911cb7f3776f4beb662994b9bbf75780abb885",
    "signature": "0x0723bdc55d35b6e993b3d5b70d92fdc025469628f77242dd6a5f4b39d12ccea248ffca34526e0be3cf19dc8e122fcc280d870ff56bcc75f3ad477cde83774cc61b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}