{
  "manageEntity": {
    "action": "Save",
    "entityId": "1113121",
    "entityType": "Track",
    "nonce": "0xcd2a206ba4073cbac1447aa1511307d60d55197d534e9b392af991dda8c95387",
    "signature": "0xc03d7526d7b5554b1b043f8923b0922bfb9a3319153d095bc0897c6a8ea29cf56e4089f246414c54ae6f72b39ea924aca45fd1bd831473f1af0af41b0c38467d1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}