{
  "manageEntity": {
    "action": "Save",
    "entityId": "522597585",
    "entityType": "Track",
    "nonce": "0x94758be6d35cc8a824d182808b50bd1d51cb103706196eee6e1b605e6b70b898",
    "signature": "0xa9be31a0fe86a07618a872ab43b924e554b9d8af4e4340e6e47c47140bd0a39c518cab584d41fb4a803d466b78d0c8d949629b28f0ea37cee04c33b6649e17a71c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}