{
  "manageEntity": {
    "action": "Save",
    "entityId": "4212894",
    "entityType": "Track",
    "nonce": "0x6aa471251a4ae8b0244fdca4ff80dd84e97f98717ca6f98790f31284c14348ec",
    "signature": "0xa5fd88bf7316de03cf8493c17fc025ac9951a63bb4f6bb627803654f723f6e3636c5d88c6ce1ac9ba2cf3386af1703d0d62e97190e123119a8628413f849bfbb1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}