{
  "manageEntity": {
    "action": "Save",
    "entityId": "1306240366",
    "entityType": "Track",
    "nonce": "0xc29ccca98d043382baae94b2b4f5529abb085ed08bf412cb4820439fd62dc73c",
    "signature": "0x94f941ff5b310cba3e3dd909b621b55f1def1b785214f6aef142124600c0b5ae43cb39cf8ee1c45ee62b8f9e5f9de0d27de7067780cf64c942365cd891a400e01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}