{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777710568",
    "entityType": "Track",
    "nonce": "0x0efdd6757e2b0651b80c5044ec9531abdb7cb3d765faf1d6ee18d06ca319169b",
    "signature": "0x24d17af1cca77d9993112f408fddf7920e057c2d33282adaf8c01edfb3687f1c6cafe5cb1de0ba5a4153cd51df60a250b67b0eee6cf7a354fb7059e62065705b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}