{
  "manageEntity": {
    "action": "Save",
    "entityId": "1119475874",
    "entityType": "Track",
    "nonce": "0x8f476fbb35c84e265cfb3db1a6df361c5b9dc25a80c79f3c8b8afeb655d71e4a",
    "signature": "0xf7a6dab28b7b3e47e7dbcdcff3a94471d2b1fee02baef80891a0166af2aa32e857687b13126b23d32c64da02dca157f19715fe8b19eba91aef7b1723cc0cb6941b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}