{
  "manageEntity": {
    "action": "Save",
    "entityId": "49364099",
    "entityType": "Track",
    "nonce": "0xd75a40d1f815e408f42ca06da0c313e3e864574d895891d4fe044dc750c3fa8c",
    "signature": "0x7bf800b211cadf5c93c25416a4897e90469b22d84d6fe0ab5f0e2ba658494a98476e59c3eb99b3404f9acadda041e6daf03f30ae4525efd2b13a00ed8feb5ab51b",
    "signer": "0xbd18A0CEDC52343842f076A474bA46656B93A232",
    "userId": "194819663"
  }
}