{
  "manageEntity": {
    "action": "Save",
    "entityId": "172817",
    "entityType": "Track",
    "nonce": "0x72249d563296b1421ccf66953ecfef38f8ab23b681baaef5cb0ac7d26bb7ece9",
    "signature": "0xc807ed53903eccc96002e580e06529c50becf940b14080a7b1f3e4a1e88bcffe33ce72dab11935e435058884b0ea7a65b70b0e656abc4505ff4af5cc84ca84511c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}