{
  "manageEntity": {
    "action": "Save",
    "entityId": "898322781",
    "entityType": "Track",
    "nonce": "0xc70b2e92466ef8af3303de96483004634d4266b7889cbcb3088050e57fbaf227",
    "signature": "0x73ed03a635ae8d5261f49069fe4b0058d1c4be426afa4e7184f79e583fa8c3f44d17bb04335fe18a994e8ee91a630e0b80960af05c983ddc73f8e412e42e7f3b1c",
    "signer": "0x7C2169544c0568cB3b210f320356B6A77E891F30",
    "userId": "495616082"
  }
}