{
  "manageEntity": {
    "action": "Save",
    "entityId": "98423",
    "entityType": "Track",
    "nonce": "0xbb679c230176c107397f955c7d39239086388cc2cee26d94681927b37de3dd9b",
    "signature": "0x481f1389a37d3b4a62e33ce7a259137b7e0a14d7b4e237b103bc5eff9a221aff710a44903a36a53338b5b30826d326e048dd7260316898a5c2f061ca2b5d12321c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}