{
  "manageEntity": {
    "action": "Save",
    "entityId": "514231",
    "entityType": "Track",
    "nonce": "0x744c1418297f0acc6b7cf34e991efa06966f47b2ae7e3a35dad56ccb5376ba90",
    "signature": "0xe105b386907e38014e21687aa2b6fc8dafc6b344d7a8796b223459f054333d800bbbed5f297cafbb943e181cb590a39809bd33329d4af492680508739c9214f01c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}