{
  "manageEntity": {
    "action": "Save",
    "entityId": "81272",
    "entityType": "Track",
    "nonce": "0xee259dd517be6e60372fb85d9afb0b0679cd0d757c8793cad3b6935b52661154",
    "signature": "0xc0fdab6fd57c97b333db6ed1a23f9bfbb064c7c6a5f6efe39b77e08db2ee4a9159c21c8806ea7fad3b72bf9366349d4b66491df8ef743eded2a0d2e573c5255a1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}