{
  "manageEntity": {
    "action": "Save",
    "entityId": "345794829",
    "entityType": "Track",
    "nonce": "0x6c6ea352c8f7db6d82d5b5b9a4e54ffb6aef3b0968cfecb74cfa05d1d2292898",
    "signature": "0x428fdde8ca8bd4d1998ad0cdc83c1084b249c6e7ce3211aef7b1dd9f4adc93cf76a51605c783cca9f69ba96d22d40fb9b96afa0eaac88cd058d4aa5d5bcd7da21b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}