{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020871530",
    "entityType": "Track",
    "nonce": "0xdd24d5d0dab8cd61f72c4d05fd28fb5a19ff23365a0024fa3f08be2833e156c6",
    "signature": "0xd73876d17f4d133d6c18862fa693d47805d10fe57e72e91d0c7d3efcde3068697b1e10e0ab988d97dfb92455a62c354502ecd89b3d433ae4935a5fcbfc28b3a71b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}