{
  "manageEntity": {
    "action": "Save",
    "entityId": "994140",
    "entityType": "Track",
    "nonce": "0x53384378fdb7c97e9318f55d57207aeeedd2929f68409374a2068b4482b2fe8b",
    "signature": "0xccf4285865a3ad7c656a18d8c46c79a491d3d77a4ed10079fee256bc78b012de2a9776c8effcb0ba9c7bc8212a4f226ef3a5cbb08e7bb9bbda857589c2e820f21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}