{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625015474",
    "entityType": "Track",
    "nonce": "0x0635cdacdaf08b230d7ea3d77a02e1357c1256530f0b90431b01d51d2c7f2b95",
    "signature": "0xe238b74aaf1eb76892422931c3b56df8c6371a132afa1255a9862ec1546f13e802ecdc15c9d59467be971b8a5b12903e0ecc2f5b2133c9484c6abbe9c36789541b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}