{
  "manageEntity": {
    "action": "Save",
    "entityId": "807384070",
    "entityType": "Track",
    "nonce": "0x247bf7b2bcbf872312f999871598cc672652eeb61c7b499569fb60770543fc8b",
    "signature": "0x7183e43787fd1ab38a7b9e6cbbf677ec9d4c6a3a63809f48d834df8f1711388929d8270243eeef3b0bca18d5a7a5d40bbc427cc83123c524fab42519fa98345a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}