{
  "manageEntity": {
    "action": "Save",
    "entityId": "788871029",
    "entityType": "Track",
    "nonce": "0xb4e105a5ffbb03fed22315cbecebdee878f6c1c246ab680cf255753552363bf7",
    "signature": "0xaffa2a24b2ff3918bd7e2565869b8b72dc5af85dacf1aa1f31a7d937453c95c719ec0b2e80805a3686672403473c38cac003a5b6b28cc4a2d8f674e0e140c6b11c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}