{
  "manageEntity": {
    "action": "Save",
    "entityId": "815487271",
    "entityType": "Track",
    "nonce": "0xddb515ab53bec2b513e19eaa37476138999a0f878805cf9b3f0228825b3efbc7",
    "signature": "0x9e270b6a53fc9cb84d2aa244e40aa75dce37b9ef30e1173349deed50cb0d850b192820ecc0de47c41bc79273f0ea25d40db056c2043b5d22dde1910fe19ac43b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}