{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855370430",
    "entityType": "Track",
    "nonce": "0xac2510582a2b6edd14605c42316d028a8035dcb62fa80ec56076988d8775c2c3",
    "signature": "0x1f5dae002e0bbbff5c3c6af80c57009ebb383a81a98304d381d909cd0face8e45b4b84e105377a5fc666e494347645882a03b379527346e756838d35276586ee1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}