{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118182748",
    "entityType": "Track",
    "nonce": "0xc71229b6b7af32df64f237beb210c1c4289e3288ccec470cba8b033bab396ee0",
    "signature": "0xa5e4d0c014e8473c2b0e3f5899e280b076ce9e3fc8399fbc2e01e015637e951403f77a231ddf8ef0bff442bbb533a117dd7f4f98d1d3c45c501a08150a9bd2fa1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}