{
  "manageEntity": {
    "action": "Save",
    "entityId": "431616",
    "entityType": "Track",
    "nonce": "0xbcccbeb769bef12f2bcf959d71a08d00d410f4a294317f69762eda82af0d3d62",
    "signature": "0xb5a6d52481f0296a6e5cc3b70d8950cc44d857198425fd4ade1d5141ecb09f186ab2fc5640e4b89c84b636e97e975c122ccd78e95199dda4559294ff7512f1f81b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}