{
  "manageEntity": {
    "action": "Save",
    "entityId": "480486565",
    "entityType": "Track",
    "nonce": "0x0428a96e7747cba9b35eb35b71aff1ef699e40559e203f4e47f9b557cb233988",
    "signature": "0x7bfba9710980330acf0a1958af47a22cd605d5c7cb859409b19dc079b8f8063b2f140d4bb5987ab937bf16dd38986d70ccd9d9dbbfccc2adb936b315107cf9621b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}