{
  "manageEntity": {
    "action": "Save",
    "entityId": "145332",
    "entityType": "Track",
    "nonce": "0x1e610da835dc5711820980dc3473a52f6c6e58b6eda692edc768517e47f0ebd5",
    "signature": "0x0ff9cdde83c1d48218b52babf240d8b59c91d0ca8b55b1703a547d5d592c396e7ef6c7f7d1d08049984cf1bc57c365559e668bb130da20c68189411a90776c6d1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}