{
  "manageEntity": {
    "action": "Save",
    "entityId": "1333577457",
    "entityType": "Track",
    "nonce": "0x59f2195df1102d890b1df6326258b0aadce216da7e17f8c3a9a0ddf72baa2391",
    "signature": "0x12487a42120f7caec110e02951cf130386ec8ad1b8f58afbf5b5cbcd072031e4347cbf6ce6b498ad85778b5fb4d659572bfb3b82a3ac1ac60fbb87089fff1b4d1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}