{
  "manageEntity": {
    "action": "Save",
    "entityId": "1215577355",
    "entityType": "Track",
    "nonce": "0xb3a320f1c71295673aa7aef15e016319400b18c50c125d5de54c981b9adc674a",
    "signature": "0x4b543241011016af11b5baccb2a6c1a14902e582c62dd1c8b8fad66332cc7d416d8bee1b1a6c17f35d7c920f3918f052f19e8c286836cb2cf1772ec051ebac181c",
    "signer": "0x1Ef5331d98352E3A7eb4f177ae6BbD27cA99eD1B",
    "userId": "771602835"
  }
}