{
  "manageEntity": {
    "action": "Save",
    "entityId": "1857552545",
    "entityType": "Track",
    "nonce": "0xfd94add00eb8c763030b277f652d9fd81ebded12f11a9aeea6596d022e344b33",
    "signature": "0x3921105a767f46138a957aba1e4a596784d1682e5e0e22c871ca4315e86fe95a595063e6911bcd7df66c52519580cc7c33a58b1fccf28185a88343e2705eec791b",
    "signer": "0x019ff76C6e9072A7b7ee22fC684b4B989b8ea3b5",
    "userId": "775276681"
  }
}