{
  "manageEntity": {
    "action": "Save",
    "entityId": "701295",
    "entityType": "Track",
    "nonce": "0xf13590d42ff6f488f83355700a31dda6ffa5cc73afeb5a52e0cb01b62f1f937b",
    "signature": "0xcef2ec0adcf3d6fe95ff2bb3507a2933ce6dc48184f1b1b2bdb10a3f75425e46289175aeaa7fc48f83ca57be064b4f52eb025a432d48dd2ccc132d98a597570f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}