{
  "manageEntity": {
    "action": "Save",
    "entityId": "285507",
    "entityType": "Track",
    "nonce": "0x60b01ec324c4077f718a746cd9024682880516dfce25c4dfcc45c2822b0b5b7c",
    "signature": "0x407c0c7c288ed36f03785e2d46526dbea91982c46921bdb20da1576df22beced4ca3b42ad8b5deb8743c1dbc9ad4a8ebf4c67ef3bf74b780fd295f0c8fff3e261c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}