{
  "manageEntity": {
    "action": "Save",
    "entityId": "231793318",
    "entityType": "Track",
    "nonce": "0xfde5739793dfd836a972e484d6f5f8f7940357188d5924e48d84eb4a053bb7b6",
    "signature": "0x68fe206f3fa0b29cf00a2984088606bbdf1332202d5da8beea4054ad4fba62541f0db4ac7e9383340bbd40dba2c317c73faa58aa9ec18c9ab182f7715239b7701c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}