{
  "manageEntity": {
    "action": "Save",
    "entityId": "292880457",
    "entityType": "Track",
    "nonce": "0xe87b7fb36bdf772cd181e641d24c69051cea917860bd337b391498fead4ef3ae",
    "signature": "0x9616c16de33941cebff132b2d062f5ece52e659b8ec2086d284d9641178650787b5182ee26ec38bcfc7b772bd0746e45c4199029a9d42c167c7dcba4b97a00201c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}