{
  "manageEntity": {
    "action": "Save",
    "entityId": "681680969",
    "entityType": "Track",
    "nonce": "0xb73cd55bf6927087668527271eec1a61aac324f7783ebb453af0c86aa3b0e873",
    "signature": "0x07d2d59305c401648090eccbc3d49474bf21945549a396640b954baa52e9ba52089bf97b8fb1fa12f6f708fbdeaa3de44138424c14fa3c491e6d4a446c6e6f721b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}